"VS Error/CDrawBasic" -errors while opening Unity.

Hi. I get this error when trying to open any Unity project of my computer. Re-installing the software didn’t help, neither restarting the computer or updating a graphics driver. I haven’t deleted any files or something like that and didn’t do any changes. This just happened without warning.

So, first error is this → (picture 1.)
When I click “OK”, it will popup another error → (picture 2.)
And then it just shows both of the error messages one after another and the same time Unity project will open in the background bit by bit, until finally popup a crash screen of Unity.

I didn’t find any topics with this kind of issue on Google, so now I ask here.

What should I do next?

If anyone else got a same problem, I find a solution for this. Problem was caused because of “Asus GPU Tweak” -program was running. Just close it and you should fix the issue (although I have been it open sometime before without problems in Unity).
If anyone has the answer, why it makes this kind of issue, I will be all ears.